I'd like to lose some fat.
My local gym said that 'high intensity' running was useless, as it doesn't burn any 'fat calories' whatsoever.
I was told that I'd only burn 'fat calories' if I exercised at a much 'lower intensity'.
However, a couple of books that I've read say that what the gym told me was a misconception. One book quoted the following example:-
'High intensity' half-hour run:-
Total calories - 600;
Percentage of fat calories - 40%
Fat calories (600 x 0.4) - 240
'Low intensity' half-hour run:-
Total calories - 300
Percentage of fat calories - 70%
Fat calories (300 x 0.7) - 210
As you can see, the percentage of 'fat burning' calories is greater on the low intensity run. However, the total number of calories to which this percentage is applied is of course much fewer, meaning that fat calorie consumption is lower than with high intensity runs.
Who should I believe - the gym or the books?